//
// Copyright(c) 2015 Gabi Melman.
// Distributed under the MIT License (http://opensource.org/licenses/MIT)
//

#pragma once

#include <string>
#include <initializer_list>
#include <chrono>
#include <memory>
#include <atomic>
#include <exception>
#include<functional>

#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
#include <codecvt>
#include <locale>
#endif

#include <spdlog/details/null_mutex.h>

//visual studio upto 2013 does not support noexcept nor constexpr
#if defined(_MSC_VER) && (_MSC_VER < 1900)
#define SPDLOG_NOEXCEPT throw()
#define SPDLOG_CONSTEXPR
#else
#define SPDLOG_NOEXCEPT noexcept
#define SPDLOG_CONSTEXPR constexpr
#endif

#if defined(__GNUC__)  || defined(__clang__)
#define DEPRECATED __attribute__((deprecated))
#elif defined(_MSC_VER)
#define DEPRECATED __declspec(deprecated)
#else
#define DEPRECATED
#endif


#include <spdlog/fmt/fmt.h>

namespace spdlog {

    class formatter;
    
    namespace sinks {
        class sink;
    }
    
    using log_clock = std::chrono::system_clock;
    using sink_ptr = std::shared_ptr < sinks::sink >;
    using sinks_init_list = std::initializer_list < sink_ptr >;
    using formatter_ptr = std::shared_ptr<spdlog::formatter>;
#if defined(SPDLOG_NO_ATOMIC_LEVELS)
    using level_t = details::null_atomic_int;
#else
    using level_t = std::atomic<int>;
#endif
    
    using log_err_handler = std::function<void(const std::string &err_msg)>;
    
    //Log level enum
    namespace level {
        typedef enum {
            trace = 0,
            debug = 1,
            info = 2,
            warn = 3,
            err = 4,
            critical = 5,
            off = 6
        } level_enum;
        
        static const char* level_names[] { "trace", "debug", "info",  "warning", "error", "critical", "off" };
        
        static const char* short_level_names[] { "T", "D", "I", "W", "E", "C", "O" };
        
        inline const char* to_str(spdlog::level::level_enum l) {
            return level_names[l];
        }
        
        inline const char* to_short_str(spdlog::level::level_enum l) {
            return short_level_names[l];
        }
    } //level
    
    
    //
    // Async overflow policy - block by default.
    //
    enum class async_overflow_policy {
        block_retry, // Block / yield / sleep until message can be enqueued
        discard_log_msg // Discard the message it enqueue fails
    };
    
    
    //
    // Log exception
    //
    namespace details {
        namespace os {
            std::string errno_str(int err_num);
        }
    }
    class spdlog_ex: public std::exception {
    public:
        spdlog_ex(const std::string& msg): _msg(msg)
        {}
        spdlog_ex(const std::string& msg, int last_errno) {
            _msg = msg + ": " + details::os::errno_str(last_errno);
        }
        const char* what() const SPDLOG_NOEXCEPT override {
            return _msg.c_str();
        }
    private:
        std::string _msg;
        
    };
    
    //
    // wchar support for windows file names (SPDLOG_WCHAR_FILENAMES must be defined)
    //
#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
    using filename_t = std::wstring;
#else
    using filename_t = std::string;
#endif
    
    
} //spdlog
